防火阀 - 矩形 - 电动 - 70 摄氏度

将阻火密封包整齐排列叠放至贯穿孔洞的电缆周围，压实后依次码放。对电缆贯穿孔洞的封堵要求为封严、封全、不留缝隙，用眼睛观不透光为止。

穿越楼层或设备的贯穿孔洞，应先将钢架或钢网固定在孔洞下端，刷阻火涂料，密封包码放厚度不得少于24厘米，上部可根据现场要求加盖板或其它防火装饰物(不得采用木板或其它易燃物作为支架或盖板)。

矩形水池计算程序用于矩形水池抗浮验算和荷载计算、池壁内力计算；工程口需要的很实用的计算工具 水池长宽高均为净（内壁到内壁）尺寸；

断崖Cad矩形套料系统，可以非常快速的在cad平台对矩形零件进行自动排版的cad插件，程序经过优化，让矩形排料算法发挥超强的性能，处理速度极快！

框架-预制混凝土-预制 - 矩形梁框架-预制混凝土-预制 - 矩形梁

家具-3D-桌椅-桌子-餐桌 - 矩形家具-3D-桌椅-桌子-餐桌 - 矩形

家具-3D-桌椅-桌子-桌子 - 矩形家具-3D-桌椅-桌子-桌子 - 矩形

罗马柱矩形廊架花架

标记--建筑--标记_面积 - 防火分区标记--建筑--标记_面积 - 防火分区标记--建筑--标记_面积 - 防火分区

本文档为：DB37 388-2004 特级防火卷帘，包括：前言，要求等

GA386-2002 防火卷帘控制器 GA386-2002 防火卷帘控制器

各种单位转换公式

This study presents a nonlinear optimization technique (NOT) for conducting the back analyses of geotechnical engineering problems based on the field observations. Additional auxiliary techniques are incorporated to enhance the convergence and stability of the NOT. The developed NOT and additional auxiliary techniques are incorporated into a finite element code and then applied to the back analysis of excavation-induced wall deflection. A number of hypothetical excavation cases with various scenarios of stratigraphy and two quality excavation case histories are used to validate the developed NOT, in which the dominant soil parameters are treated as target parameters. Results show that the wall deflections of all hypothetical and actual excavation cases at each stage can be accurately and efficiently backfigured.